She should pick a narrower topic that is appropriate for an astronomy convention
Explanation:
If the convention is astronomy, the audience that will attend the presentations is a public that has an interest in this science and understands some basic concepts. For this reason, this scientist must choose a more restricted topic that goes directly to the subject addressed and that stimulates the interest and the curiosity of this type of public.
<span>She should address her audience as experts by reporting the results of her research without providing basic information or defining simple concepts. </span>